Thanks Colin, I was in the middle of a test to figure out if there is a difference with fuel in the vent line or not when I got your email.This test confirms what you said. There is no difference in flow rate if there is fuel or not in the vent line. The fuel that is in the line just bubbles out with the air.Pic of my test? https://flic.kr/p/wK4gwF
Paul ViskBelleville Il618-406-4705
